Spool winding machine

ABSTRACT

The invention concerns a manufacturing method of a spool of wire, comprising the following steps: MAINTAINING CONTINUALLY UNDER TENSION THE WIRE TO BE WOUND BETWEEN A SUPPLY SPOOL AND A CLAMPING DEVICE OF THIS WIRE WHICH IS CARRIED BY THE SPINDLE; MAKING ONE COMPLETE REVOLUTION OF THE SPINDLE WHEN THE WIREGUIDE IS LOCATED IN AN EXTREME POSITION TOWARDS THIS SPINDLE IN ORDER TO POSITION CORRECTLY THE FIRST TURN OF THE SPOOL; DRIVING THE SPINDLE IN ROTATION FOR A NUMBER OF TURNS CORRESPONDING TO THE NUMBER OF TURNS OF THE SPOOL, THE WIREGUIDE DISPLACING ITSELF IN A RECIPROCAL MOVEMENT WHICH IS CONTROLLED BY THE ROTATION OF THE SPINDLE; OPENING THE WIRE CLAMPING DEVICE; MAKING, WHEN THE WIRE-GUIDE IS IN EXTREME POSITION TOWARDS THE SPINDLE, ONE COMPLETE REVOLUTION OF THIS SPINDLE TO PLACE A NEW PORTION OF WIRE INTO THE CLAMPING DEVICE AND THEREBY EXTRACTING SIMULTANEOUSLY THE PORTION OF WIRE LEADING TO THE FIRST TURN OF THE SPOOL; CLOSING AGAIN THE WIRE CLAMPING DEVICE AND CUTTING SIMULTANEOUSLY THE END OF THE WIRE COMING FROM THE LAST TURN OF THE SPOOL AND FINALLY EJECTING THE COMPLETED SPOOL.

United States Patent Sallin 1 1 Jan. 7, 1975 i 1 SPOOL WINDING MACHINE spool of wire, comprising the following steps: [75] Inventor: Pierre Sam, Gemvav Switzerland maintaining continually under tension the wire to be wound between a supply spool and a clamping Assigneei PFQdUCUOHS Sarcem Geneva, device of this wire which is carried by the spindle; Switzerland making one complete revolution of the spindle [22] Filed: June 28 1973 when the wire-guide is located in an extreme position towards this spindle in order to position [21] App]. No: 374,505 correctly the first turn of the spool;

driving the spindle in rotation for a number of turns 30 D corresponding to the number of turns of the l Forelgn Apphc atmn Pnomy am spool, the wire-guide displacing itself in a July I8, 1972 Switzerland 10752/72 reciprocal movement which is Controlled y the rotation of the spindle; [5%] E1561]. Opening the wire Clamping device; 2 'P i 242 making, when the wire-guide is in extreme position 1 0 care towards the spindle, one complete revolution of this spindle to place a new portion of wire into [56] References cued the clamping device and thereby extracting UNITED STATES PATENTS simultaneously the portion of wire leading to the 1,397,316 11/1921 Cullin 140/922 first turn of the spool; 1,995,916 3/1935 Collinsm, 140/922 closing again the wire clamping device and cutting 2,085,957 7/1937 Collins 140/922 i l o l th nd of the wire coming from Primary Examiner-Lowell A. Larson Attorney, Agent, or Firm-Young & Thompson {57] ABSTRACT The invention concerns a manufacturing method of a the last turn of the spool and finally ejecting the completed spool.

16 Claims, 11 Drawing Figures PATENTEU H975 3,858,624

. SHEET 10F 5 u 14 *HI :mrmw W5 3.858.624

'SHEET 20F 5 FIG.2

FATENTEU 7 {975 SHEET NF 5 SPOOL WINDING MACHINE The invention concerns a winding machine comprising a rotative spindle as well as a rotative counterspindle, a driving motor to rotate the spindle, a wireguide displacable in a reciprocal linear movement which is parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, as well as a numerical control device of the cycle of the winding machine. This winding machine comprises further mounted on the spindle, a wire clamping device as well as a cutting device for this wire and it comprises further, also mounted on the spindle, a cam causing during its rotation which occurs simultaneously with the rotation of the spindle, and when the wire is in an axial position with respect to the spindle, the introduction of this wire into the clamping device of the wire.

There exist numerous machines particularly machines for winding very thin wires the diameter of which may be of the order of the tenths of microns. None of these machines permits a completely automatic operation and the worker has to take the wire and place it adequately at the start of the winding of each spool. It is evident that this is extremely slow and thus onerous particularly when one is winding very thin wires which are hardly visible and which break easily.

The aim of the present invention is to remedy these drawbacks by providing a winding machine which is entirely automatic.

The present invention has for its object a winding machine comprising a rotative spindle and a rotative counter-spindle, a wire-guide the longitudinal position of which is controlled through the rotation of the spindle, as well as a numerical control controlling all the cycles of the machine.

The invention uses in particular, in part for the numerical control and for the control of the back and forth mouvement of the wire-guide the characteristics of control device for a linear displacement as a function of a rotative displacement which are described in French Pat. No. 7,006,159.

The manufacturing method of a spool according to the invention distinguishes itself by the fact that one maintains continuously under tension the wire to be wound between a supply spool and a wire clamping device carried by the spindle; that one makes one complete revolution of the spindle when the wire-guide is located in an extreme position towards this spindle in order to position correctly the first turn of the spool; that one drives the spindle in rotaton for a number of turns corresponding to the number of turns of the spool, the wire-guide displacing itsself with a reciprocal movement controlled by the rotation of the spindle; that one opens the clamping device of the wire; that one makes, when the wire-guide is in extreme position on the side of the spindle, one turn of this spindle to place a new portion of wire into the clamping device and extracting simultaneously the portion of wire leading to the first turn of the spool; that one closes again the clamping device of the wire and cuts simultaneously the end of the wire coming from the last turn of the spool and finally that one ejects the tenninated spool.

The invention has further for its object a winding machine for carrying out the automatic winding method described which comprisess a rotative spindle and a rotative counter-spindle, a driving motor to rotate the spindle, a wire-guide displacable with a reciprocal linear movement which is parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle as well as numerical control of the cycle of the winding machine, characterized by the fact that it comprises mounted on the spindle a wire clamping device as well as a cutting device and by the fact that it comprises further, also mounted on the spindle a cam causing during its rotation which is simultaneous to that of the spindle and when the wire is in an axial position corresponding, with respect to the spindle, the introduction of this wire into the clamping device.

The attached drawing shows schematically by way of example certain parts of one embodiment of the winding machine according to the invention.

FIG. I is a longitudinal cross-section of the spindle.

FIG. 1a is a longitudinal cross-section of the spindle at degrees with respect to FIG. 1.

FIG. 2 is a longitudinal cross-section on a smaller scale of the counter-spindle.

FIG. 3 is a partial view of the spindle and of its counter-spindle in winding position.

FIG. 4 is a partial view of the spindle and of the counter-spindle at the moment when the spool is terminated and when the clamping device for the wire is open.

FIG. 5 shows the spindle and counter-spindle in ejection position of a terminated spool.

FIG. 6 shows the spindle and the counter-spindle in the position at the start of the winding of a new spool.

FIG. 7 is an end elevation view of the spindle.

FIG. 8 is a general view of the machine.

FIG. 9 is an axial cross-section of the spindle and of the counter-spindle of a preferred embodiment of the winding machine.

FIG. 10 is an enlarged view of a cross-section along the line II-II of FIG. 9.

It is to be noticed that often in the manufacturing of miniaturized spool using wire of a few microns to a few tenths of a micron one has to make self supporting spools that is spools without cores or flanges. This may be achieved by making the winding under hot condition since the wires are provided with a thin layer of thermoplastic material which adheres the turns the one to the others to constitue a rigid spool without any support.

To avoid having to take the wire by hand between each spool to start a new spool, one has developed a guiding device, a clamping device as well as a cutting device for the wire permitting to realize the same operations but automatically.

The winding method consists mainly in maintaining continuously the wire under tension, between the spool being wound and the supply spool or between this latter and the clamping device.

This method comprises particularly the following operations:

l. The clamping of the wire in the clamping device mounted on the spindle in order to maintain the wire under tension.

2. At the time when the wire-guide is in extreme winding position towards the spindle, the rotation of one turn of the spindle and of the counterspindle. Thus, the first turn is applied against the cheek of the spindle and its position is correct and secure.

3. The winding itself has a rotation of the spindle and of the counter-spindle together with the reciprocal displacement of the wire-guide which is controlled by the rotation of the spindle. Then the spindle is constituted on a core of the counter-spindle between the cheeks of the spindle and of the counterspindle. The number of turns of the spindle corresponds to the number of turns of the spool.

4. The displacement up to its extreme winding position of the wire-guide towards the spindle, then a subsequent displacement of this wirelguide towards the spindle, and the opening of the clamping device of the wire. It is to be noted that this frees the inner wire of the spool but that the wire to be wound remains under tension between the last turn of the spool and the supply spool.

5. The rotation of one turn of the spindle which causes the introduction of a new portion of wire into the clamping device and simultaneously, by means of a finger carried by the wire-guide, the extraction of the portion of wire, leading to the first turn of the spool and which was previously maintained by the clamping device.

6. The return in extreme winding position, towards the spindle, of the wire-guide causing the closure of the clamping device of the wire. This closure causes simultaneously by means of a knife, the cutting of the wire between the last turn of the terminated spool and the clamping device of the wire. Thus the terminated spool is separated from the wire to be wound.

7. The ejection of the spool which is realized here by the return position of the counter-spindle and of its core as well as by an ejection arm insuring that this extraction be realized so that the finished spool may be maintained against the cheek of the counter-spindle.

8. The returning to winding position of the counterspindle and of its core.

The cycle continues thus by the operation 2 men tioned above. There has been realized a winding cycle whidh is entirely automatic without any manual intervention which was the desired result.

The winding machine comprises a base 1 on which are mounted different elements of the machine. A spindle 2 is driven in rotation by an electrical step by step motor. A counter-spindle 4 is also rotative, but driven in rotation by the spindle 2. This counter-spindle comprises a core 5 emerging from a cheek 6. This core 5 as well as this cheek 6 are displacable linearly axially of the counter-spindle either together or separately.

The winding machine comprises further a wire-guide 7 able to be displaced parallel to the axes of the spindle and of the counter-spindle as well as perpendicularly to this direction.

The reciprocal displacements parallel to the axis of the spindle of the wire-guide 7 are controlled by the rotation of the spindle in order to distribute adequately the turns of this spool.

Finally the machine comprises further a supply spool for the wire 8, a tension device for this wire as well as an electronic digital control causing according to a determinated sequence the different operations of the winding cycle.

This control makes use of conceptions and elements which are well known and will not be described here.

The spindle is terminated by a cheek 9 the central bore 10 of which is intended to receive the core 5 of the counter-spindle. When the core 5 is in winding position, introduced in the bore 10, it is coupled to the spindle by means of a pin 11, located in its terminal slot 12. In this position the cheeks 6 and 9 of the counterspindle and spindle define the length of the spool to be made. The cheek 9 of the spindel comprises further a groove 13 for the introduction of the wire permitting one to lead the wire to be wound up to the core 5 to constitute the first wire without being in the way thereafter of the formation of the spool and particularly without hindering the flatness of the flank which is in contact with the cheek 9 of the spindle.

The cheek 9 is fastened with a cam 14 for the introduction of the wire into a clamping device of this wire. This cam has the shape of a plate of circular shape provided with a cut out 15 forming a beak 16.

A sleeve 17 sliding axially on the spindle is guided by pins l8, 19, 20 and subjected to the action of a spring tending to displace it against the rear face of the cam 14. The frontal face of this sleeve 17 defines with the rear face of the cam 14 a slot of varying thickness. The frontal face of this sliding sleeve 17 comprises, located between the pins 19 and 20 a clamping pad 21 intended to enter in contact with the rear face of the cam 14 and to clamp the wire to be wound. This frontal face of the sleeve 17 carries further a knife 22, located between the pins 18 and 19, intended to cut the wire which comes to rest against the rear face of the cam 14. The edge of this knife 22 is however retracted with respect to the frontal face of the pad 21, which is of resilient material, when this pad is not compressed. In this way with the approach of the sleeve 17 towards the cam 14, the wire is first clamped by the pad 21 before it is cut by the knife 22. The pins 18, 19 and 20 define resting surfaces for the wire which comes to be wound around them. The last pin 20 is provided with a helicoidal slot 23 one to guide the wire through a notch 24 of the cam 14 to have this wire come out between this cam and the sleeve.

When a spool is terminated, the wire f coming out of the last turn which has been wound and coming from the supply spool 8 is displaced towards the left (FIG. 4) by the wire-guide further to its extreme left winding position, in order to be applied against the cheek 9 to extend then beyond the plane defined by the cam 14.

In this position the wire-guide displaces the sleeve 17 in order to free the wire.

The wire f coming from the first central turn of the spool passes into the helicoidal groove 23 of the pin 20, passes beyond the cam 14 through its notch 24 but is no longer clamped between the rear face of this cam and the pad 21.

When the wire-guide is in this position of the end of the winding, and extractor 25 on this wire-guide is disposed in the way of the wire portion f During the rotation of one turn of the spindle comprising operation 5 of the winding method, the extractor 25 breaks the wire j; off between the cam 14 and the sleeve 17 and the wire f passing through the notch 15 is introduced between the sleeve 17 and the cam 14. This wire f, comes to rest on the pins 18 to 20 and is located in front of the pad 21 to be clamped in front of the knife 22.

When the wire-guide comes back in position for the start of the winding, the wire f takes the place of the wire f guided by the groove 23 and comes to be lodged between the groove 13 and the check 9.

Simultaneously the sleeve 17 comes back towards the cam 14 causing first the clamping of the wire by the resilient pad 21 then its cutting by the knife 22. The wire is thus always maintained under tension and it is ready for the winding of a new spool.

This new winding may be made once the extraction of the terminated spool has been made. In order to do that the counter-spindle is displaced towards the right (FIG. 5) separating the first spool from the check 9 of the spindle, then the core 5 is retracted within the counter-spindle and finally an ejection lever 26 ejects the spool which may eventually stick against the cheek 6 of the counter-spindle. These movements of the counter-spindle are controlled by the numerical con trol pneumatically, mechanically or hydraulicly.

It is further to be noted that the distance between the two beaks of the wire-guide must be determinated with great precision. In fact to insure a good winding it is necessary that the wire is guided with the smallest clearance in its guide however with wires of a few microns in diameter it is necessary to avoid any clamping which would cause rupture of this wire.

For this, and Since it is not possible to measure with accuracy a slot of a few microns, one machines the faces of the beaks of the wire-guide which confront one another in order that these are perfectly plane. Then this face being maintained the one against the other one drills a hole centered on the slot between the two beaks the dimension is exact but of a dimension which can be measured, for example 2 to 3 mm. Then to define the distance between the beaks one places in this hole a pin or a spacing element the outside dimensions of which is equal to that of the hole increased by the distance which is desired between the beaks. It is thus easy to measure the slot of 2.012 mm to insure for example the free passage of a wire of 11 microns between the beaks of the wire-guide.

In order to form the spool in a very precise manner it is necessary that the wire be guided as near as possible to the spool. This is achieved by advancing, during the winding the wire-guide in the direction of the axis of the spindle.

The embodiment shown in FIGS. 9 and is an improvement of the embodiment described and concerns mainly the realization of the spindle of the winding machine described.

The winding machine comprises thus a rotative spindle 31 the front end of which comprises a cheek 32 defining with the cheek 33 of the counter-spindle 34. The space in which the wire 35 is wound around the core 36 of the counter-spindle for the making of a spool. The counter-spindle 34 is axially displacable with respect to the winding machine while the core is axially displacable with respect to the counter-spindle to allow the evacuation of a terminated spool 37.

The cheek 32 is fastened on the hollow axis 31 of the spindle by means of a screw 38 and can thus be easily exchanged when one has to change from one type of fabrication of this spool to another. Tightened between the shoulder 39 of the core of the cheek 32 and the end of the hollow axis 31 is a cam 40 which is fixedly secured to the cheek 32 and to the hollow axis 31 and revolves thus together with these two elements. This cam 40 presents two radial notches 41, and 41a and its hub comprises a turning 42 and a cutting surface 43. An 0- ring 44 is located on the turning 42.

The cutting device of the wire comprises a sleeve 45 sliding without play on the hollow axis to which it is keyed in order to insure its driving rotation by means ofa pin 46 the inside end of which is located in a longitudinal groove 47 provided in the periphery of the hollow shaft 31. This sleeve is terminated at its rear end by a flange 48 and at its front end by a cutting edge 49 which is circular intended to cooperate with the cutting surface 43 carried by the hub of the cam 40.

This sleeve 45 is submitted to the action of the spring 50 tending to displace it in direction of the cutting surface 43.

The clamping device of the wire comprises a second sleeve 51, sliding axially on the sleeve 45 and subjected to a spring 52 tending to displace it towards the O-ring 44. This sleeve 51 presents a longitudinal slot 53 in which is the outside end of the pin 46. Thus, this pin is coupled to the sleeve 45 for its driving in rotation but is able to effectuate axial displacement with respect to the hollow shaft 31. The spring 52 is stronger than the spring 50 so that in the rest position shown, the fore end of the sleeve 51 is applied in its clamping position of the wire against the O-ring 44 while the sleeve 45 is maintained in rear inoperative position.

The machine comprises further a control member of the axial displacements of the sleeves 45, 51 between themselves and with respect to the hollow shaft 31. This control member is constituted by a support 54 displacable parallel to the spindle 31 under the action of a control device of the machine. The support comprises an actuating finger 55 located rearwardly from the flange 48 and roller bearing 56 located forwardly of the flange 48, this finger and this roller bearing being adapted to enter in contact with the said flange 48.

The machine comprises further an extractor of the wire constituted by the finger 57 radially displacable with respect to the spindle and which may come to place itself in active position within a groove of the cheek 32.

The operation of the winding machine of FIGS. 9 and 10 is as follows.

After ejection of a terminated spool, the core 36 is displaced towards the left with respect to the counterspindle in order to emerge from the check 33 and the counter-spindle is displaced towards the spindle up to its illustrated position in which the space located between the two cheeks 32 and 33 corresponds to the width of the spool to be realized. The core 36 penetrates into the central opening of the check 32.

The wire-guide (not shown) is placed in winding starting position in such a manner that the wire present itself as indicated on the drawing, the end of this wire being firmly maintained by the clamping device of the wire.

The extractor is then withdrawn radially towards the outside up to its inoperative position.

The spindle and the counter-spindle are then rotated a number of turns corresponding to the number of turns of the spool to be manufactured less one and are then again stopped.

The support 54 is displaced towards the left which causes the entering in contact of the roller bearing 56 with the flange 48 and the displacement of the sleeve 45 and thus of the second sleeve 51 against the action of the spring 50. This causes the liberation of the starting wire of the spool clamped between the frontal face of the sleeve 51 and the O-ring 44.

The spindle makes the last turn during which the extractor 57 is set in active position within the groove of the cheek 32 and causes the extraction of the starting wire of the spool out of the clamping device of this wire.

The wire guide is then displaced towards the left, that is in direction of the clamping device of the wire, and the spindle makes one additional revolution, outside of the spool, in the space formed by the displacement towards the left in the position shown in the drawing, and the sleeves 45 and 51 come back into the position illustrated which permits the clamping of the wire which will be used for the next spool in the device 44, 51.

The wire-guide is displaced towards the right, the wire passing through the cam through the notch 41 to come in winding starting position.

The support 54 is displaced towards the fore end of the spindle and the finger 55 enters in contact with the flange 48 causing the advance of the sleeve 51 against the action of the spring 52, the pin 48 displacing in its groove 53. The cutting edge 49 enters in contact with the cutting surface 43 and the wire is cut. The support 54 comes thereafter back to its middle position which is a rest position shown as well as the sleeve 51. The counter-spindle is taken away from the spindle and the core 36 is retracted within the counter-spindle 34 causing thus the evacuation of the spool which is terminated.

It is possible with this machine to realize spools having intermediate outputs. It is in fact sufficient to cancel the cutting operation and the operation of extraction of the wire as well as the extraction of the spool. Thus, after a first layer, subsequent layers can be wound. Then, when the spool is terminated the cutting operation is realized, cutting all the wires of the different layers of the spool, the extraction operation of these wires and of ejection of the spool may then be carried out.

To achieve the intermediate outputs it is possible if the cutting position is not opposed with respect to the wire-guide, to give a different length to the output wires of the lower layer than the input wire of the immediately superposed layer which permits one to differentiate them. Therefore it suffices that the cutting edge 49 of the sleeve 45 be interrupted on a portion of its p'eriphery, the remaining portion being not diametrally opposed to the wire-guide.

We claim:

1. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, a numerical control device for the cycle of the winding machine, a wire-clamping device and a wire-cutting device mounted on the spindle, a cam mounted on the spindle for rotation with the spindle for introducing wire into said clamping device, said cam comprising a plate having therein at least one radial notch for the reception of the wire, means mounting the spindle for axial reciprocal movement, and spring means urging the spindle toward said cam.

2. Winding machine according to claim 1 characterized by the fact that the spindle comprises three pins extending axially and located between the cam and the spindle, these pins defining resting surfaces for the wire which is located between the spindle and the cam.

3. Winding-machine according to claim 2 characterized by the fact that the spindle comprises on its face directed towards the rear face of the cam, a knife and a resilient pad. I

4. Winding machine according to claim 3 characterized by the fact that the knife is located on a straight line connecting the first and second pin whereas the resilient pad is located on a straight line connecting the second and the third pad.

5. Winding machine according to claim 4 characterized by the fact that the third pin has a helicoidal groove guiding the wire which is located between the cam and the spindle up to beyond the cam.

6. Winding machine according to claim 1 characterized by the fact that the wire-guide comprises an extractor.

7. Winding machine according to claim 1 characterized by the fact that the wire-guide is displacable in a direction which is perpendicular to the axis of the spindel.

8. Machine according to claim 1, characterized by the fact that the cam is constituted by a planar disk which is fast with a hub.

9. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, a numerical control device for the cycle of the winding machine, a wire-clamping device and a wire-cutting device mounted on the spindle, a cam mounted on the spindle for rotation with the spindle for introducing wire into said clamping device, the wire-clamping device comprising a sleeve coaxial with the spindle and displaceable axially relative to the spindle, the cam having a hub carrying an O-ring, and a spring urging said sleeve against said O-ring.

10. A winding machine according to claim 9, said wire-cutting device comprising a sleeve coaxial with the spindle and axially movable relative to the spindle, said cam having a hub having a cutting surface that coacts with a cutting surface on an end of said cutting device sleeve.

11. Winding machine according to claim 10 characterized by the fact that the sleeve of the cutting device of the wire slides without play on the spindle whereas the sleeve of the clamping device of the wire slides without clearance on said cutting device sleeve.

12. Machine according to claim 11 characterized by the fact that said spring tends to displace the sleeves the one with respect to the other, the sleeve of the clamping device being displaced forwardly and the sleeve of the cutting device being displaced rearwardly.

13. Machine according to claim 12 characterized by the fact that the axial displacement of both sleeves the one with respect to the other is limited by a pin which is fast with the sleeve of the cutting device and which displaces itself in a slot provided in the other sleeve.

14. Machine according to claim 13 characterized by the fact that the sleeve of the cutting device of the wire is subjected to the action of a spring, which is not so strong than the spring acting between the two sleeves, tending to displace them towards the fore end of the spindle and to maintain the sleeve of the clamping device of the wire in abutment against the O-ring.

15. Machine according to claim characterized by the fact that the sleeve of the cutting device comprises at its rear end a flange intended to enter in contact with a control member of the axial displacements of the two sleeves.

16. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of surface on an end of said sleeve to cut said wire. 

1. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, a numerical control device for the cycle of the winding machine, a wire-clamping device and a wire-cutting device mounted on the spindle, a cam mounted on the spindle for rotation with the spindle for introducing wire into said clamping device, said cam comprising a plate having therein at least one radial notch for the reception of the wire, means mounting the spindle for axial reciprocal movement, and spring means urging the spindle toward said cam.
 2. Winding machine according to claim 1 characterized by the fact that the spindle comprises three pins extending axially and located between the cam and the spindle, these pins defining resting surfaces for the wire which is located between the spindle and the cam.
 3. Winding-machine according to claim 2 characterized by the fact that the spindle comprises on its face directed towards the rear face of the cam, a knife and a resilient pad.
 4. Winding machine according to claim 3 characterized by the fact that the knife is located on a straight line connecting the first and second pin whereas the resilient pad is located on a straight line connecting the second and the third pad.
 5. Winding machine according to claim 4 characterized by the fact that the third pin has a helicoidal groove guiding the wire which is located between the cam and the spindle up to beyond the cam.
 6. Winding machine according to claim 1 characterized by the fact that the wire-guide comprises an extractor.
 7. Winding machine according to claim 1 characterized by the fact that the wire-guide is displacable in a direction which is perpendicular to the axis of the spindel.
 8. Machine according to claim 1, characterized by the fact that the cam is constituted by a planar disk which is fast with a hub.
 9. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, a numerical control device for the cycle of the winding machine, a wire-clamping device and a wire-cutting device mounted on the spindle, a cam mounted on the spindle for rotation with the spindle for introducing wire into said clamping device, the wire-clamping device comprising a sleeve coaxial with the spindle and displaceable axially relative to the spindle, the cam having a hub carrying an O-ring, and a spring urging said sleeve against said O-ring.
 10. A winding machine according to claim 9, said wire-cutting device comprising a sleeve coaxial with the spindle and axially movable relative to the spindle, said cam having a hub having a cutting surface that coacts with a cutting surface on an end of said cutting device sleeve.
 11. Winding machine according to claim 10 characterized by the fact that the sleeve of the cutting device of the wire slides without play on the spindle whereas the sleeve of the clamping device of the wire slides without clearance on said cutting device sleeve.
 12. Machine according to claim 11 characterized by the fact that said spring tends to displace the sleeves the one with respect to the other, the sleeve of the clamping device being displaced forwardly and the sleeve of the cutting device being displaced rearwardly.
 13. Machine according to claim 12 characterized by the fact that the axial displacement of both sleeves the one with respect to the other is limited by a pin which is fast with the sleeve of the cutting device and which displaces itself in a slot provided in the other sleeve.
 14. Machine according to claim 13 characterized by the fact that the sleeve of the cutting device of the wire is subjected to the action of a spring, which is not so strong than the spring acting between the two sleeves, tending to displace them towards the fore end of the spindle and to maintain the sleeve of the clamping device of the wire in abutment against the O-ring.
 15. Machine according to claim 10 characterized by the fact that the sleeve of the cutting device comprises at its rear end a flange intended to enter in contact with a control member of the axial displacements of the two sleeves.
 16. A winding machine comprising a rotatable spindle, a rotatable counter-spindle driven by said rotatable spindle, a driving motor for rotating said spindle, a wire guide displaceable with reciprocable linear movement parallel to the axis of the spindle and the movement of which is controlled by the rotation of the spindle, a numerical control device for the cycle of the winding machine, a wire-clamping device and a wire-cutting device mounted on the spindle, a cam mounted on the spindle for rotation with the spindle for introducing wire into said clamping device, said cam having a hub, said wire-cutting device comprising a sleeve coaxial with the spindle and axially movable relative to the spindle, said hub having a cutting surface that coacts with a cutting surface on an end of said sleeve to cut said wire. 